url地址中文乱码问题，解决速结贴，求大牛

有控制器但是，根据上面写出来解决中文乱码问题

function down_load() {
    var row = $('#dg').datagrid('getSelected');
    if (row && row.isFile) {
        location.href = '${ctx}/fileupload/download_file_url?fileName='
                + row.fileName + '&fileDir=' + base + "/"
                + row.filePath.replace(row.fileName, '');
    } else {
        jQuery.messager.alert('提示:', '请选择文件');
    }
}根据这个写出下面的
$('#canvasImage3').att('src','${ctx}/fileupload/download_file_url?fileName='+${requestScope.fileName}
                + '&fileDir='+${requestScope.filePath});，可是没有成功不明白原因

http://jingyan.baidu.com/article/6c67b1d6ee75dc2787bb1e24.html

${ctx}/fileupload/download_file_url?fileName=${requestScope.fileName}&fileDir=${requestScope.filePath}'

url编码不是uTF-8和GBK，所以你需要先对整条URL惊醒编码，然后解码

get方法传输浏览器会进行编码，需要对变量进行encode，然后进行传输。

加个这个属性看看 contentType : "text/plain;charset=UTF-8",

@RequestMapping(value = "download_file_url", method = RequestMethod.GET)
public void download_file_url(String fileDir, String fileName,
HttpServletResponse response) {
transportFile(new File(SystemConstants.Path.PROJECT + File.separator
+ EncodeUtils.isoDecode(fileDir) + File.separator + EncodeUtils.isoDecode(fileName)),
EncodeUtils.isoDecode(fileName), response);

}
控制器代码,根据这个写出转换的方法，我写的怎么都不能转换/$('#canvasImage3').att('src','${ctx}/fileupload/download_file_url?fileName=' + fileName
                //+ '&fileDir='+${requestScope.filePath});
//$('#canvasImage3').att('src','${ctx}/fileupload/download_file_url?fileName=${requestScope.fileName}&fileDir=${requestScope.filePath}');